No Way would I ever use a 25 watt soldering iron to do pl 259s like
that F8 guy does..... wonder how many poor pl 259 connections he has
and does not even know it?
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Perhaps is it useful to mention that PL259 type of connectors for 3/8inch
(10mm) OD coax are available with a cable entry as per a standard
N-connector eg a metal braid sleeve with rubber cable compression ring.
The only soldering required is for the centre pin.
The ones I use are of a high quality ,having a gold-plated centre pin . They
are made in Taiwan ; the UK price some time ago was GBP 3.00 (US$ 5.50) .
Perhaps a bit expensive but well worth buying.

Frank GMØCSZ / KN6WH